Grand Island
September
Weather in Grand Island for September 2025
Your guide to Grand Island weather in September - trends and predictions
In general, the average temperature in Grand Island at the beginning of September is 29.7 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 29 °F by the end of September.
Grand Island experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 46.1 mm.
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Temperatures
Rain 🌧️
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24
Dry days
6
Rainy days
0
Snow days
30°/15°
Temperatures
25 km/h
Avg max wind
47 %
Avg humidity
Grand Island in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  29° | 2 30° | 3 30° | 4 33° | 5  29° | 6 29° | 7 28° |
| 8 32° | 9 35° | 10  37° | 11 35° | 12 33° | 13 33° | 14 30° |
| 15  31° | 16 31° | 17  28° | 18 32° | 19  31° | 20  31° | 21  31° |
| 22  15° | 23 24° | 24 24° | 25 28° | 26 29° | 27 30° | 28 30° |
| 29 31° | 30 31° |
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Temperatures trend during September in Grand Island
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Sunny | 29° /18° | 0 mm | 7 | |
| Sept. 2 | Sunny | 30° /13° | 0 mm | 8 | |
| Sept. 3 | Sunny | 30° /13° | 0 mm | 8 | |
| Sept. 4 | Sunny | 33° /16° | 0 mm | 8 | |
| Sept. 5 | Partly cloudy | 29° /18° | 0 mm | 7 | |
| Sept. 6 | Partly cloudy | 29° /14° | 0 mm | 7 | |
| Sept. 7 | Sunny | 28° /11° | 0 mm | 7 | |
| Sept. 8 | Sunny | 32° /14° | 0 mm | 8 | |
| Sept. 9 | Sunny | 35° /21° | 0 mm | 9 | |
| Sept. 10 | Patchy rain possible | 37° /20° | 0 mm | 8 | |
| Sept. 11 | Sunny | 35° /17° | 0 mm | 9 | |
| Sept. 12 | Sunny | 33° /17° | 0 mm | 8 | |
| Sept. 13 | Partly cloudy | 33° /20° | 0 mm | 8 | |
| Sept. 14 | Patchy rain possible | 30° /16° | 3 mm | 7 | |
| Sept. 15 | Patchy light rain with thunder | 31° /18° | 2.6 mm | 7 | |
| Sept. 16 | Patchy rain possible | 31° /18° | 1.3 mm | 7 | |
| Sept. 17 | Moderate or heavy rain shower | 28° /19° | 26.6 mm | 6 | |
| Sept. 18 | Light rain shower | 32° /20° | 6.7 mm | 7 | |
| Sept. 19 | Mist | 31° /18° | 0 mm | 7 | |
| Sept. 20 | Cloudy | 31° /14° | 0 mm | 7 | |
| Sept. 21 | Overcast | 31° /16° | 0 mm | 7 | |
| Sept. 22 | Heavy rain at times | 15° /11° | 5.8 mm | 4 | |
| Sept. 23 | Sunny | 24° /6° | 0 mm | 6 | |
| Sept. 24 | Overcast | 24° /11° | 0 mm | 5 | |
| Sept. 25 | Sunny | 28° /9° | 0 mm | 7 | |
| Sept. 26 | Sunny | 29° /12° | 0 mm | 7 | |
| Sept. 27 | Sunny | 30° /11° | 0 mm | 8 | |
| Sept. 28 | Mist | 30° /11° | 0 mm | 7 | |
| Sept. 29 | Sunny | 31° /13° | 0 mm | 8 | |
| Sept. 30 | Sunny | 31° /12° | 0 mm | 8 | |
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Important Notice
Our weather forecast for Grand Island in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Grand Island forecast closer to your planned date for the most up-to-date weather information.
Grand Island in September - FAQ
What are the expected maximum and minimum temperatures in Grand Island during September?
Expect warm days with temperatures around 30°, cooling to mild conditions of 15° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Grand Island during September?
In September, Grand Island can expect light to moderate rainfall, totaling 46.1 mm across approximately 6 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Grand Island during September?
The average wind speed in Grand Island during September is 25 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Grand Island
Explore the daily rainfall trends and prepare for Grand Islands September weather 💧
UV exposure in Grand Island during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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